uclibc-ng/libm/metag/feenablxcpt.c

/* Enable floating-point exceptions.
   Copyright (C) 2013 Imagination Technologies Ltd.
   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; see the file COPYING.LIB.  If
   not, see <http://www.gnu.org/licenses/>.  */

#include <fenv.h>
#include <unistd.h>

#include "internal.h"

int
feenableexcept (int excepts)
{
  unsigned int old_exc;

  /* Get the current control word.  */
  __asm__ ("MOV %0,TXDEFR" : "=r" (old_exc));

  old_exc &= FE_ALL_EXCEPT;

  excepts |= old_exc;

  metag_set_fpu_flags(excepts);

  return old_exc;
}